Zero Voltage Switching Chipset Enables Up To 50% Smaller PSUs at 100W Power Levels and Low BOM Cost
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Dialog Semiconductor announced digital Zero Voltage Switching (ZVS) chipset to enable 100 Watt and beyond High Power Density (HPD) Power Supply Units (PSUs) that are 30-50% smaller than conventional high power PSUs. Zero Voltage Switching chipset includes the iW9801 primary-side controller and the iW709 secondary-side USB PD protocol IC. With ZVS chipset, designers can reduce component size and BOM cost to enable smaller form-factor, lighter weight power supplies, including travel adapters for smartphones, tablets, laptops, power tools, and other portable devices.
ZVS RapidCharge solution provides seamless multi-mode control for up to 94% efficiency and eliminates audible noise for high power charging with safe, cool operation in a small physical charger size. Its low standby power of less than 20mW delivers an eco-friendly solution. The chipset offers robust protection for over-voltage (OVP), over-current (OCP), user-configurable over-temperature, shoot-through, brown-in/brown-out VSENSE/ISENSE short, output short, and extra primary-side OCP and OVP. Its secondary-side digital compensation loop ensures stability and eliminates the need for extra compensation components. The integrated synchronous rectifier controller in the secondary-side iW709 further reduces the overall component count.
ZVS chipset supports most fast charge protocols, including USB PD 3.0 with Programmable Power Supply (PPS) and other third-party proprietary protocols. It employs switching frequencies up to 200kHz, so designers can use a much smaller and lighter transformer and smaller passive components to reduce charger size and weight. This complete solution uses built-in digital compensation, making circuit design quick and easy compared to analog approaches.
Davin Lee, Senior Vice President and General Manager of the Advanced Mixed-Signal Business Group at Dialog Semiconductor said that, “The introduction of Dialog’s patented ZVS technology builds on our extensive AC/DC expertise and expands our addressable market into higher power density PSUs. With this innovative ZVS chipset, customers can simply design higher power density chargers that are not only light-weight and ultra-small, but also very cost-effective.”